Seagate Momentus 640 GB,Internal,5400 RPM SATA 2.5" (ST9640423AS) HDD HARD DRIVE | eBay
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Toshiba MK6465GSX 640GB laptop hard drive • The Register
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WD6400AAKS-75A7B0, DCM HBNNHT2CB, Western Digital 640GB SATA 3.5 Hard Drive - Walmart.com - Walmart.com